The One Big Beautiful Bill Act (OBBBA), signed into law on July 4, 2026, preserves the 30% Residential Clean Energy Credit (Section 25D) through the end of 2026, but introduces income-based eligibility limits starting January 1, 2027, followed by a phasedown to 22% by 2029. The law also increases tariffs on imported solar panels by an additional 15%, raising equipment costs by an estimated $0.10–$0.15 per watt. Homeowners who install and place a system in service before December 31, 2026 can lock in the full 30% credit with no income restrictions.
The One Big Beautiful Bill Act represents the most significant overhaul of residential energy tax policy since the Inflation Reduction Act of 2022 expanded the solar tax credit to 30% and extended it through 2032. OBBBA accelerates the phase-down timeline and adds new eligibility restrictions that weren’t in the original IRA framework.
Here’s exactly what changed:
Under the IRA, the 30% Residential Clean Energy Credit was locked in through 2032. OBBBA shortens this significantly:
This means a homeowner installing a $30,000 solar system in 2026 receives a $9,000 tax credit. The same system installed in 2027 would yield $7,800 (26%) — but only if the homeowner’s income qualifies. By 2028, it drops to $6,600 (22%), and after 2029, the federal credit is gone.
The most controversial change in OBBBA is the introduction of means testing for the solar tax credit, which previously had no income restrictions. Starting in 2027:
For context, the median household income for solar adopters in 2025 was approximately $95,000–$120,000, meaning most current solar buyers would still qualify for the full credit under the new income caps. However, households in high-cost-of-living areas (San Francisco Bay Area, New York Metro, etc.) are more likely to exceed the thresholds.
The OBBBA maintains the standalone battery storage tax credit but modifies the requirements:
This means a homeowner installing a Tesla Powerwall 3 (13.5 kWh) at a cost of $12,000 in 2026 still gets the full $3,600 credit. The same installation in 2027 would yield $3,120 (26%) — but only if income qualifies. See our comprehensive solar battery storage guide for current battery pricing and sizing recommendations.
The Energy-Efficient Home Improvement Credit (Section 25C) covers things like insulation, heat pumps, and energy-efficient windows at 30% up to certain annual caps. Under OBBBA:
To make this concrete, here’s what the OBBBA changes mean in real dollars for three common system sizes:
The message is clear: the financial difference between installing in 2026 vs. 2027 can be $1,200–$6,000 or more, depending on system size and income. For higher-income households that lose the credit entirely, the gap is $9,000–$15,000.
Use our solar panel ROI calculator to model your specific payback timeline under different credit scenarios.
Beyond tax credit changes, OBBBA includes a provision increasing tariffs on imported solar panels and cells. The key changes:
This tariff increase interacts with the tax credit phase-down in a particularly painful way for 2027 buyers: equipment costs go UP while the credit percentage goes DOWN. A $30,000 system in 2026 costs $21,000 after the 30% credit. A comparable system in 2027 might cost $31,500 (tariff-adjusted), and after the 26% credit, the net cost would be $23,310 — that’s $2,310 more for the same system, just one year later.
For a deep dive on current pricing dynamics, see our analysis of solar panel prices in 2026: tariffs, inflation, and new tech.
It’s equally important to understand what the law does NOT affect:
Check your state’s specific programs using our solar panel state incentives guide.
OBBBA makes different changes to commercial solar (Section 48 ITC and Section 45 PTC), including accelerated depreciation modifications. These do not affect homeowners claiming the residential credit under Section 25D. If you’re a small business owner considering solar for a commercial property, consult a tax professional about the Section 48 changes.
If your solar system was already installed and placed in service before July 4, 2026 (the OBBBA signing date), nothing changes about your tax credit. You already qualify for the full 30% under the original IRA rules. OBBBA only affects systems placed in service after its enactment — and for the remainder of 2026, the rules remain the same as before.
The single most important action under OBBBA is to complete your installation and place the system in service before December 31, 2026. This locks in:
The IRS considers a system “placed in service” when it is installed and operational — not when you sign the contract. A typical residential installation takes 4–12 weeks from contract to activation, so the deadline to start is approximately October 2026 to safely complete before year-end.
If your AGI exceeds $300,000 (MFJ) or $150,000 (single), the OBBBA effectively eliminates your federal solar tax credit starting in 2027. Your options:
The OBBBA phase-down creates a tension between acting now (for the tax credit) and waiting (for better/cheaper technology). Our analysis:
The OBBBA solar provisions create winners and losers:
No. The 30% Residential Clean Energy Credit (Section 25D) remains fully available through December 31, 2026, with no income restrictions. The OBBBA changes — income thresholds and credit phase-down — only take effect starting January 1, 2027. Any solar system placed in service during 2026 qualifies for the full 30% credit.
If your AGI exceeds $400,000 (married filing jointly) or $200,000 (single), you will receive $0 federal solar tax credit starting in 2027. Between $300,000–$400,000 (MFJ) or $150,000–$200,000 (single), the credit phases out proportionally. In 2026, there are no income limits at all — this is why installing before year-end is critical for higher-income households.
No. The IRS determines credit eligibility based on the year the system is placed in service — meaning installed, inspected, and producing electricity. If your system is activated on January 1, 2027 or later, the OBBBA income thresholds and 26% rate apply, even if you signed the contract or purchased the equipment in 2026. Plan your installation timeline carefully to ensure activation before December 31, 2026.
The OBBBA adds a 15% tariff on imported solar cells and modules, which is expected to increase residential system costs by approximately $0.10–$0.15 per watt. For a typical 6 kW system, this translates to $600–$900 in additional equipment costs. Combined with the credit reduction from 30% to 26% in 2027, the total financial impact of waiting until 2027 can be $2,000–$4,000 or more compared to installing in 2026.
Yes. The OBBBA enhances the domestic content provision, offering an additional 2% credit (bringing the total to 32%) for residential solar systems using 100% US-manufactured panels and inverters. This bonus is available through 2026 alongside the base 30% credit. However, qualifying products are limited — currently only a handful of US manufacturers (First Solar, Qcells Georgia, Silfab) produce panels domestically, and US-made inverter options are also limited.
The standalone battery storage credit under Section 25D remains at 30% through 2026 for systems with at least 3 kWh of capacity. Starting in 2027, the storage credit follows the same phase-down schedule as solar panels (26% in 2027, 22% in 2028, expired after 2029). The income thresholds apply to the combined total of solar AND storage credit claimed on your tax return. OBBBA also broadens the eligible technologies to explicitly include iron-air, sodium-ion, and flow batteries alongside traditional lithium-ion systems.
The OBBBA makes one thing crystal clear: 2026 is the best year to go solar for the foreseeable future. Between the full 30% tax credit, no income restrictions, and pre-tariff equipment pricing, the financial case for acting now is stronger than it will be for years.
Ready to see your numbers? Use our solar panel savings calculator to estimate your system size, cost, payback period, and lifetime savings. Then explore financing options to find the best way to fund your installation before the OBBBA changes take effect.
The clock is ticking — December 31, 2026 will be here before you know it.